Loading...
Correspondence City of Tigard, Oregon 9 13125 SW Hall Blvd. o Tigard, OR 97223 l nilz, ! N' ° =a , a' r , January 24, 2007 A re � ® AVatvo • •r• Sir•: American Heating Inc. Robert J Smith 1339 SE Gideon St Portland, OR 97202 RE: NEW BUILDING MECHANICAL SYSTEM — BUILDING # A - SHELL Project Information Building Permit: MEC2006 -00538 Construction Type: II -B Tenant Name: OPUS Northwest Occupancy Type: B 4 Address: 16037 SW Upper Booncs Ferry Occupant Load: 710 + Area: 74,388 sq ft Stories: 3 The plan review was performed under the State of Oregon Mechanical Specialty Code (OMSC) 2004 • edition. The submitted plans are approved subject to the following. 1. Equipment and appliances shall be installed as required by the terms of their approval, in accordance with the conditions of the listing, the manufacturer's installation instructions and this code. , Manufacturer's installation instructions shall be available on the job site at the time of inspection. OMSC 304.1 2. The building or structure shall not be weakened by the installation of mechanical systems. Where floors, walls, ceilings or any other portion of the building or structure are required to be altered or replaced in the process of installing or repairing any system, the building or structure shall be left in a safe structural condition in accordance with the Building Code. The cutting, notching and boring of framing members shall comply with OMSC 302 Sections 302.3.1 through 302.5.3. 3. Smoke detectors shall be installed in return air systems with a design capacity greater than 2000 cfm. Upon activation, the smoke detector shall shut down the air distribution system. Smoke detectors shall be connected to a fire alarm system and shall activate an audible and visible alarm at a constantly attended location. OMSC 606. 4 Equipment and appliances regulated by this code requiring electrical connections shall have a positive means of disconnect in accordance with the Electrical Code. OMSC 301.7 5. Appliances shall be accessible for inspection, service, repair or replacement without removal of permanent construction. OMSC 306.1 Phone: 503.639.4171 • Fax: 503.684.7297 • www.tigard- or.gov • TTY Relay: 503.684.2772 , 6. Ducts shall be supported with approved hangers at intervals not exceeding 10 feet or by other approved duct support systems designed in accordance with the Building Code. Flexible and other factory -made ducts shall be supported in accordance with the manufacturer's installation instructions. OMSC 603.10 7. Metallic Ducts shall be supported in accordance with Sheet Metal & Air Conditioning Contractors National Association, Inc. (SMACNA) — Metal and Flexible. OMSC 603.4 8. Every refrigerant system shall be tested and proved tight after complete installation, and before operation. Tests shall include both the high- and low- pressure sides of each system at not less than the lower of the design pressures or the setting of the pressure relief device(s). The design pressures for testing shall be those listed on the condensing unit, compressor or compressor unit name - plate, as required by ASHRAE 15. OMSC 1108.1 9. OAR 918 -440 -0015 Refrigeration Installer Certification All persons engaged in brazing or welding related to the installation, alteration or repair of refrigeration piping systems not regulated by the Oregon Boiler and Pressure Vessel Program under OAR Chapter 918, Division 225, shall be certified in accordance with the requirements of this rule. 10. Gas piping systems under 14 inches water column pressure, shall be tested at a pressure of not less than10 pounds per square inch gage. Test pressures shall be held for not less than 15 minutes with no perceptible drop in pressure. For welded piping, and for piping carrying gas at pressures exceeding 14 inches water column (3484 Pa) pressure, the test pressure shall be at least 60 pounds per square inch for not less than 30 minutes. C406.4.1 11. Where vibration isolation of equipment and appliances is employed, an approved means of supplemental restraint shall be used to accomplish the support and restraint OMSC 301.10 12. Condensate from cooling coils or evaporators shall be collected and discharged to an approved plumbing fixture or disposal area. OMSC 307.1 Approved Plans: 1 set of approved plans, bearing the City of Tigard approval stamp, shall be maintained on the jobsite. The plans shall be available to the Building Division inspectors throughout all phases of construction. 106.4.2 OSSC When submitting revised drawings or additional information, please attach a copy of the enclosed City of Tigard, Letter of Transmittal. The letter of transmittal assists the City of Tigard in tracking and processing the documents. . Respectfu , i t, al enz • 1, Senior Plans Examiner